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TITLE:
GD Graphics Library GIF File Handling Denial of Service

SECUNIA ADVISORY ID:
SA20500

VERIFY ADVISORY:
http://secunia.com/advisories/20500/

CRITICAL:
Less critical

IMPACT:
DoS

WHERE:
>From remote

SOFTWARE:
GD Graphics Library 2.x
http://secunia.com/product/4178/

DESCRIPTION:
Xavier Roche has discovered a vulnerability in the GD Graphics
Library, which potentially can be exploited by malicious people to
cause a DoS (Denial of Service) against applications and services
using libgd.

The vulnerability is caused due to an infinite loop error within the
handling of GIF images. This can be exploited to consume a large
amount of CPU resources when the "gdImageCreateFromGifPtr()" function
is used with a specially crafted GIF image.

The vulnerability has been confirmed in version 2.0.33. Other
versions may also be affected.

SOLUTION:
Restrict use to GIF images from trusted sources only.

PROVIDED AND/OR DISCOVERED BY:
Xavier Roche

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